Spray pump



July 12, 1938. R. BERNHARD'' Filed April :50, 1936 ,nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnne n nnn n nnnnnnnnnnn nn n .rnn Il!! "Y @ad 73H4@ ATTQRNEY.

` 40 `valve seat 8.

Patented July 12, 1938 UNITED STATES PATENT ,'QFFHSCE' Rudolph Bernhardt, Chicago, Ill.

Application April 30, 1936, Serial No. I17,217

2 Claims.

This invention relatesparticularly to improvements in the detalls of construction of small pumps or sprayers such as commonly used for spraying liquids from bottles or containers.

Among the objects of this invention are to provide an improved pump or sprayer which can be made at a very low cost and which will be efficient and durable in operation; to provide an improved cylinder' for spray pumps drawn or formed from a single piece of sheet metal; to provide an improved piston; and to provide such other advantages and improvements as will appear from the following description.

In the accompanying drawing illustrating this invention,

Figure l is a side View of a bottle or container with my improved pump mounted therein;

Figure 2 is an enlarged sectional View ofthe cylinder and piston; Figure 3 is a perspective view of the cylinder; Figure 4 is a perspective view of the piston and aV portion of the piston rod; and

Figure 5 is a sectional detail of the lower end of the cylinder taken at approximately right angles to Figure 2;

As shown in the drawing, E represents a bottle er container having my improved pump or sprayer mounted therein. The pump has a cylinder 'l which is adapted to rest on the bottom of the bottle as shown in Figure 1,` in order to support the same against the downward thrust of the piston. Heretofore cylindersof this kind have usually been made of two or more pieces, tubing being frequently used with a washer or head secured in the end thereof for the valve seat. In accordance with this invention I draw or form the cylinder from a single piece of metal, preferably sheet metal, to provide the main tubular portion 'l and an integrally `formed head and The head has a downwardly extending annularbead or edge 9 which engages with the bottom of the bottle and has an upward- 1y or inwardly extending annular rib l with a groove Il therebetween. The annular rib l0 defines an inlet opening or hole l2 and also provides a seat for the ball valve I 3. A plurality of radial grooves or indentations I4 are provided around the lower end or through the annular bead 9 to 50 permit free passage of .liquid from the bottle to the hole I2. My improvedcylinder may be readily drawn from suitable sheet metal with all of the parts thus described formed therein, thus facilitating the rapidity of manufacture as well as re- 55 ducing the cost of the same and providing a (Cl. 10S- 188) unitary structure having no parts to become loosened or get out of order.

A U-shaped ball retainer i5 is placed over the ball I3 and has outwardly extending feet or projections It which are engaged by the spring I'l 5 for holding the retainer in position.

The upper end of the spring Il engages with a disc or washer IB having an outlet hole or valve seat l 9 which is engaged by a ball valve 2li in the form shown, although in some instances this 10 valve` may be omitted, particularly where the discharge is provided with a small aperture.

The disc E8 engages with the lower end of the piston 2l which is also preferably formed of a single piece of suitable material such as sheet 15 metal and which ts closely within the inner bore of the cylinder 1. The upper end of the piston is reduced to form a bearing or neck 22 which receives Vthe: lower end ofthe hollow piston rod or discharge pipe 23 which is preferably secured 2c thereto by means of a driving iit or frictional engagement. The pistonis held in operative position in the cylinder by projections 2li formed by indenting the cylinder adjacent to the upper end thereof. Y 25 lThe discharge pipe 23 extends up through the cap of the bottle and is provided with any suitable spraynozzle or the like 25 and with a thumbpiece 26 for reciprocating the same to actuate the sprayer. 30

It will also be noted that the drawing or forming of the piston out of a single piece of sheet metal or the like tends to reduce the cost of the same and the provision of the neck portion 22 which is secured directly to the end of the hollow 3 rod or pipe 23 permits the use of shorter rods or tubing and thus reduces the 'cost of the complete pump. Y

Having thus-described my invention what I claim is:

1. In'a spray pump, the combination of a cylinder formed of sheet metal having an integrally formed closed end adapted to rest upon the bottorn of a receptacle from which liquid is to be pumped, said end extending upwardly into the cylinder and having an inlet opening therein, radial passageways around the end, a valve engaging with. `said opening, a valve retainer over said valve, a spring engaging with said retainer,

a washer engaging with the opposite end of the spring, a tubular piston formed of sheet metal tting closely within the cylinder and having its lower end engaging with said washer, projections at the top of the cylinder for holding the piston in engagement with the cylinder, said piston having a reduced tubular upper end, a hollow piston rod having its lower` end fixed in said reduced upper end, and a discharge nozzle for said rod.

2. In a spray pump, the combination of a cylinder formed of sheet metal having an integrally formed closed end adapted to rest upon the bottom of a receptacle from which the liquid is to be pumped, said end extending upwardly into the cylinder and then downwardly, defining an inlet opening and forming a tapered valve seat, inlet passageways around the end, a valve engaging with said opening, a valve retainer over said valve, a spring engaging with said retainer, a

lfor holding the piston in engagement with the cylinder, said piston having a reduced tubular upper end, a hollow piston rod having its lower end fixed in said reduced upper end and having a discharge at its upper end.

' RUDOLPH BERNHARDT. 

